Valve-removing tool.



C. O. THROP.

VALVE REMOVING TOOL.

APPLICATION FILED-JAN.29.1917.

1 234 9 7 Patented July 31, 191?;

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CLARENCE OTTO THROP, OF JEFFERSON, IOWA.

VALVE-REMOVING TOOL.

Specificationof Letters Patent.

Patented July 31, 1917.

Application filed January 29, 1917. Serial No. 145,102.

To all whom it may concern:

Be it known that I, CLARENCE O'r'ro THROP, citizen of the United Statesof America, and resident of Jefferson, Greene county, Iowa, haveinvented a new and useful Valve- Removing Tool, of which the followingis a specification.

The object of this invention is to provide improved means of simple,durable and inexpensive construction, and adapted for manual actuationfor preliminary use in removing valves from internal combustion engines.

A further object of this invention is to provide a hand tool of novelconstruction adapted to be used in assembling or disassembling valvedevices of an internal combustion engine, said tool being so constructedand the parts thereof so arranged that one member of the tool has afixed relation to the engine while another member is movable relative tothe fixed member for the purpose of compressing a valve spring orraising said spring in such manner as to permit manual access to andoperation of parts of a valve contained in said engine.

A further object of this invention is to provide a hand tool with astationary member, a movable member on and in opposition to thestationary member, and. a lever on the movable member, acting on thestationary member and reacting on and moving the movable member.

My invention consists in the construction, arrangement and combinationof elements hereinafter set forth, pointed out in my claims andillustrated by the accompanying drawing, in which Figure 1 is a plan ofmy improved valveremoving tool. Fig. 2 is an elevation, partly insection and on a reduced scale, showing my improved tool in position-forpractical use.

It is well known to be difiicult to remove valves of an internalcombustion engine especially after said engine has been assembled andused and it is desired to remove the valves for regrinding, or forgrinding of their seats. In ordinary construction a valve employed tocontrol the ingress of explosive fluid to the engine is formed with astem adapted to be engaged and placed in open position by a tappet orsupplemental stem operated by a cam. Ordinarily the valve stem is formedwith a loose collar held thereon in one direction by a key or pinextending through the stem and a spring is mounted between andexpansively impinges said collar and a guide through which the valvestem may reciprocate. The spring is under tension at all times, and, inorder to remove the key or pin and permit the Withdrawal of the valvestem through the spring and away from its seat, said spring must becontracted away from and relieved from pressure upon the key or pin. Inengines of difi erent construction the valves are diflerently arrangedwith relation to the cylinders and the same tool, in-respect ofdimensions and arrangement of parts, may not ordinarily serve forcompressing springs so differently arranged and located. The tool hereinshown and described is particularly adapted for use with a variety oftypes of engines. a

In the construction and application of the device as shown the numeral10 designates generally those parts of an engine to which the tool isapplied, in the construction of which a valve stem 11 is mounted forreciprocation through a guide or bearing member 12. On the stem 11 aremounted an expansive coil spring 13 and collar 14:. One end portion ofthe spring 13 normally impinges the guide 12 and the opposite endportion of said spring normally impinges the collar 11 and tends to movesaid collar away from said guide. Movement of the collar away from theguide 12 is limited and determined by a. key or pin 15 removably andreplaceably mounted through the extremity of the valve stem 11. I haveshown also a tappet 11 opposed to the extremity of the valve stem 11 andadapted when operated in a common manner, the devices for the operationof which 'are not shown, to engage said valve stem and remove the valvefrom its seat in opposition to and by compression of the spring 13. p

The tool itself has a fixed or stationary member 16 which is'formed on amild compound curve longitudinally, is concavo-convex in cross-sectionthroughout a major portion of its length, and terminates at one end in afork 18 expanded laterally and relatively thin. The fixed member 16 isformed with ears 16 and said ears are formed with registering pivotholes. A movable member 17 is formed with a rightangled extension 17 atone end,which rightangled extension is bifurcated, extends between theears l6, and is formed with transverse holes registering with the holesin said ears and adapted to receive a pivot or bolt 20 whereby themovable member is pivoted to the fixed member. The body portion of themovable member 17 extends substantially parallel with the forked portionof the fixed member 16 and terminates in a fork 19 in opposition to andregistration with the fork 18. The movable member 17 also is formedconcavo-convex in cross-section throughout a major portion of its lengthand has its concaved face placed in opposition to the concaved face ofthe fixed member 16. A lever 21 is mounted through the fork of theright-angled ex tension 17 and is formed with a bent-up end portion 21which extends through a slot 22 in the movable member 17. The extension21 is formed with a series of transverse holes 23 registeringselectively with transverse holes in the movable member 17 and saidholes'are adapted to receive a pivot 25 which serves as a connection forthe lever. The handle portion of the lever 21 is concave-convex incross-section and is arranged with its concaved face in opposition tothe concaved face of a handle portion of the fixed member 16. Themovable member 17 also is provided with a slot 22 forming an extensionof the furcate of the extension 1?" to permit the lever to oscillatefrom horizontal to vertical position and vice versa. The lever 21 isformed with a cam face 24, indicated partially by dotted lines in Fig.2, adapted to engage the fixed member 16 within the concavity betweenthe ears 16 and the fork 18, and said cam face serves as a fulcrum forsaid lever, and also serves as a lock to hold the lever in closedposition on said fixed member.

In the practical use of the tool the pivot 25 is selectively mounted ina hole 23, the lever 21 is turned into substantially vertical position,the forks 18 and 19 are introduced between the collar 14 and tappet 11*,the fork 18 resting on the tappet and the fork 19 engaging the collar.Then the lever 21 is moved through an are manually into the positionshown in Fig. 2. During such movement the cam face 24 engages the fixedmember 16 and causes the lever to react through the pivot 25 and movethe movable member 17 through an arc to the position shown. member 17efiects a separation of the fork 19 from the fork 18, thus compressingthe spring 13 and raising the collar 14 from the key 15, after which thekey may be removed conveniently, the tool being re moved by contractingit, and the valve and valve stem be lifted out through the spring.

It will be noted that when the lever 21 has been moved to the positionshown in Fig. 2, the cam face 24 thereof is located beneath the pivot 25and between the bolt Such movement of the movable- 20 and pivot 25, andthe parts are locked, because of such arrangement in such position andneed not be held manually by the operator.

1 claim as my invention 1. A valve-removing tool, comprising a fixedmember formed with ears, a movable member pivoted to and between saidears and formed with a longitudinal slot, a hand lever pivoted to themovable member, extending through and adapted to traverse said slot andhaving an offset integral part adapted to engage the fixed memberbetween the pivots of the movable member and hand lever respectively andmove said movable member relative to said fixed member, and opposedengaging forks on said fixed and movable members adapted to engagerespectively a fixed object and a spring-pressed object.

2. A valve-removing tool, comprising a fixed member formed with meansfor engaging a fixed object, a movable member pivoted to the fixedmember and formed with means for engaging a spring-pressed object andalso formed with a longitudinal slot, and a hand lever pivoted on saidmovable member, extending through and adapt ed to traverse said slot andformed with a cam face for engaging said fixed member between the pivotsof the movable member and hand lever respectively and moving saidmovable member away from and looking it relative to said fixed member.

3. A valve-removing tool, comprising a fixed member formed with meansfor engaging a fixed object, a movable member pivoted to the fixedmember and formed with means for engaging a spring-pressed object, and ahand lever adjustably pivoted on said movable member and formed with acam face for variably engaging said fixed member between the pivots ofthe movable member and hand lever respectively and moving said movablemember away from and locking it relative to said fixed member.

4. A valve-removing tool, comprising a fixed member formed with meansfor engaging a fixed object, a movable member pivoted to the fixedmember and formed with means for engaging a spring-pressed object, and ahand lever pivoted on said movable member and formed with a cam face forengaging said fixed member and moving said movable-.me'mber away fromsaid fixed memher, said cam face also serving to hold the handle andfixed members in closed positions and stationary relative to each other,whereby said movable member is held in separated relation to said fixedmember.

5. A valve-removing tool, comprising a fixed member formed with meansfor engaging a fixed object, a movable member formed with a right-angledextension at one end and pivoted to the central portion of said fixedmember and formed at its oppoengage said fixed member between the pivotssite end with means for engaging a springof the movablemember and handlever repressed object, a lever formed at one end spectively. 0 with a.bent-up extension pivoted to and in- Signed by me at J elferson, Iowa,this 23d 5 termediate the ends of said movable member, day of January,1917.

said lever being formed with a cam face at the base of the bent-upextension adapted to I CLARENCE OTTO THROP.

